\chapter{介绍}
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%\section{How to use this manual}
%A very basic introduction to Geant4 is presented in Section Getting Started with Geant4 - Running a Simple Example. It is a recipe for writing and running a simple Geant4 application program. New users of Geant4 should read this chapter first. It is strongly recommended that this chapter be read in conjunction with a Geant4 system installed and running on your computer. It is helpful to run the provided examples as they are discussed in the manual. To install the Geant4 system on your computer, please refer to the Installation Guide for Setting up Geant4 in Your Computing Environment.
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%Section Toolkit Fundamentals discusses general Geant4 issues such as class categories and the physical units system. It goes on to discuss runs and events, which are the basic units of a simulation.
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%Section Detector Definition and Response describes how to construct a detector from customized materials and geometric shapes, and embed it in electromagnetic fields. It also describes how to make the detector sensitive to particles passing through it and how to store this information.
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%How particles are propagated through a material is treated in Section Tracking and Physics. The Geant4 “philosophy” of particle tracking is presented along with summaries of the physics processes provided by the toolkit. The definition and implementation of Geant4 particles is discussed and a list of particle properties is provided.
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%Section User Actions is a description of the “user hooks” by which the simulation code may be customized to perform special tasks.
%
%Section Control provides a summary of the commands available to the user to control the execution of the simulation. After Chapter 2, Chapters 6 and 7 are of foremost importance to the new application developer.
%
%The display of detector geometry, tracks and events may be incorporated into a simulation application by using the tools described in Section Visualization.
%
%Section Examples provides a set of basic, novice, extended and advanced simulation codes which may be compiled and run “as is” from the Geant4 source code. These examples may be used as educational tools or as base code from which more complex applications are developed.
%}
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%\section*{如何使用本手册}
%
%\textcolor[rgb]{1.00,0.00,0.00}{Geant4入门 - 运行一个简单示例}一节介绍了GEANT4的一个非常基本的介绍。这是编写和运行一个简单的GEANT4应用程序的秘诀。 GEANT4的新用户应该先阅读本章。强烈建议您将本章与安装并在计算机上运行的GEANT4系统一起阅读。按照手册中的讨论运行所提供的示例很有帮助。要在您的计算机上安装GEANT4系统，请参阅在计算环境中设置Geant4的安装指南。
%
%\textcolor[rgb]{1.00,0.00,0.00}{工具包基础概念}一节讨论了一般GEANT4问题，例如class categories 和 physical units system。接下来继续讨论运行和事件，这是模拟的基本过程。
%
%\textcolor[rgb]{1.00,0.00,0.00}{探测器定义和响应}一节描述了如何从定制材料和几何形状构建探测器，并将其嵌入电磁场中。它还介绍了如何使探测器对通过它的粒子以及如何存储这些信息敏感。
%
%\textcolor[rgb]{1.00,0.00,0.00}{Tracking and Physics，跟踪和物理}一节中处理如何通过材质传播粒子。介绍粒子追踪的GEANT4“理念”以及该工具包提供的物理过程摘要。讨论了GEANT4粒子的定义和实现，并提供了粒子属性列表。
%
%\textcolor[rgb]{1.00,0.00,0.00}{User Actions，用户操作部分}一节是对“用户挂钩【user hooks】”的描述，通过该用户挂钩可以对模拟代码进行定制以执行特殊任务\footnote{translate by九九之九}。
%
%\textcolor[rgb]{1.00,0.00,0.00}{Control}一节提供了用户可用于控制模拟执行的命令摘要。在第2章之后，第6章和第7章对于新的应用程序开发者来说是最重要的。
%
%探测器几何图形，轨迹和事件的显示可以通过使用\textcolor[rgb]{1.00,0.00,0.00}{Visualization}一节中描述的工具合并到仿真应用程序中。
%
%\textcolor[rgb]{1.00,0.00,0.00}{Examples}一节提供了一组基本的，新手的，扩展的和高级的模拟代码，它们可以从GEANT4源代码中“按原样”编译和运行。这些示例可以用作教育工具或作为开发更复杂应用程序的基本代码。
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\begin{parcolumns}[]{2}
\colchunk{\section{How to use this manual}
A very basic introduction to Geant4 is presented in Section Getting Started with Geant4 - Running a Simple Example. It is a recipe for writing and running a simple Geant4 application program. New users of Geant4 should read this chapter first. It is strongly recommended that this chapter be read in conjunction with a Geant4 system installed and running on your computer. It is helpful to run the provided examples as they are discussed in the manual. To install the Geant4 system on your computer, please refer to the Installation Guide for Setting up Geant4 in Your Computing Environment.

Section Toolkit Fundamentals discusses general Geant4 issues such as class categories and the physical units system. It goes on to discuss runs and events, which are the basic units of a simulation.

Section Detector Definition and Response describes how to construct a detector from customized materials and geometric shapes, and embed it in electromagnetic fields. It also describes how to make the detector sensitive to particles passing through it and how to store this information.

How particles are propagated through a material is treated in Section Tracking and Physics. The Geant4 “philosophy” of particle tracking is presented along with summaries of the physics processes provided by the toolkit. The definition and implementation of Geant4 particles is discussed and a list of particle properties is provided.

Section User Actions is a description of the “user hooks” by which the simulation code may be customized to perform special tasks.

Section Control provides a summary of the commands available to the user to control the execution of the simulation. After Chapter 2, Chapters 6 and 7 are of foremost importance to the new application developer.

The display of detector geometry, tracks and events may be incorporated into a simulation application by using the tools described in Section Visualization.

Section Examples provides a set of basic, novice, extended and advanced simulation codes which may be compiled and run “as is” from the Geant4 source code. These examples may be used as educational tools or as base code from which more complex applications are developed.}

\colchunk{
\section*{如何使用本手册}
\textcolor[rgb]{1.00,0.00,0.00}{Geant4入门 - 运行一个简单示例}一节介绍了GEANT4的一个非常基本的介绍。这是编写和运行一个简单的GEANT4应用程序的秘诀。 GEANT4的新用户应该先阅读本章。强烈建议您将本章与安装并在计算机上运行的GEANT4系统一起阅读。按照手册中的讨论运行所提供的示例很有帮助。要在您的计算机上安装GEANT4系统，请参阅在计算环境中设置Geant4的安装指南。

\textcolor[rgb]{1.00,0.00,0.00}{工具包基础概念}一节讨论了一般GEANT4问题，例如class categories 和 physical units system。接下来继续讨论运行和事件，这是模拟的基本过程。

\textcolor[rgb]{1.00,0.00,0.00}{探测器定义和响应}一节描述了如何从定制材料和几何形状构建探测器，并将其嵌入电磁场中。它还介绍了如何使探测器对通过它的粒子以及如何存储这些信息敏感。

\textcolor[rgb]{1.00,0.00,0.00}{Tracking and Physics，跟踪和物理}一节中处理如何通过材质传播粒子。介绍粒子追踪的GEANT4“理念”以及该工具包提供的物理过程摘要。讨论了GEANT4粒子的定义和实现，并提供了粒子属性列表。

\textcolor[rgb]{1.00,0.00,0.00}{User Actions，用户操作部分}一节是对“用户挂钩【user hooks】”的描述，通过该用户挂钩可以对模拟代码进行定制以执行特殊任务\footnote{translate by九九之九}。

\textcolor[rgb]{1.00,0.00,0.00}{Control}一节提供了用户可用于控制模拟执行的命令摘要。在第2章之后，第6章和第7章对于新的应用程序开发者来说是最重要的。

探测器几何图形，轨迹和事件的显示可以通过使用\textcolor[rgb]{1.00,0.00,0.00}{Visualization}一节中描述的工具合并到仿真应用程序中。

\textcolor[rgb]{1.00,0.00,0.00}{Examples}一节提供了一组基本的，新手的，扩展的和高级的模拟代码，它们可以从GEANT4源代码中“按原样”编译和运行。这些示例可以用作教育工具或作为开发更复杂应用程序的基本代码。}
%  \colchunk{测试}
  \colplacechunks
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